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2000
Volume 12, Issue 2
  • ISSN: 2213-3372
  • E-ISSN: 2213-3380

Abstract

Introduction

In this study, three amine-tethered DMAP cation bromide catalysts were prepared using two different mole ratios of 4-dimethylpyridine (DMAP) and 3-bromopropylamine hydrobromide (BPA·HBr) in two different solvents, namely, acetonitrile and ethanol. Then, prepared catalysts were employed for CO cycloaddition with styrene and propylene epoxides under metal- and solvent-free conditions.

Methods

The impact of mole ratio and solvent selection to prepare the designed product using a simple and cost-effective procedure was demonstrated systematically and was discussed in detail. Moreover, the influence of amine-tethered DMAP cation catalyst structures and reaction conditions on the cycloaddition was investigated, and the CO conversion proceeded smoothly at 80°C and 0.2 MPa for the synthesis of cyclic carbonates in good to excellent yields and high selectivity.

Results

The current protocol could be a promising process at an industrial scale due to the high recyclability of the catalyst (10 cycles).

Conclusion

In summary, three catalytic systems bearing amine-tethered DMAP cation have been investigated for the chemical fixation of CO into five-membered cyclic carbonates at mild conditions.

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2024-10-17
2025-07-17

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Amine-tethered DMAP Cation Catalysts: An Efficient Organocatalytic System for the Chemical Fixation of CO2 to Five-Membered Cyclic
Curr. Organocatal. 12, 116 (2025); https://doi.org/10.2174/0122133372341092241008062213
/content/journals/cocat/10.2174/0122133372341092241008062213
/content/journals/cocat/10.2174/0122133372341092241008062213
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  • Article Type:     Research Article
Keyword(s): Carbon dioxide fixation; cycloaddition; DMAP cation catalyst; organocatalysis; solvent effects; waste prevention

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